Upgrading your graphics card is one of the best feelings a PC enthusiast or gamer can have, especially if that new GPU is an RTX 4090. However, Nvidia’s brand-new graphics card comes with a host of demands and recommendations, the most prominent among them being a power supply that can handle its souped-up TDP.
If the time has come to upgrade your GPU with an RTX 4090, you’ll need a new PSU that’s capable enough to stand toe to toe with Nvidia’s new product. A stronger and more resistant power unit that can maintain the lofty demands of the RTX 4090 isn’t easy to find, but luckily we’ve tracked down the absolute best power supplies to support that raging 4090.
- BEST PSU FOR RTX 4090
Corsair RM1000X Shift
- Wattage: 1000W
- Form Factor : ATX
- Rating: 80 Plus Gold, Cybenetics Gold
- Design: Fully modular, side connectors
-
BEST WATTAGE PSU FOR RTX 4090EVGA Supernova 1600W Platinum
- Wattage: 1600W
- Rating: 80 PLUS Platinum Certified
- Form Factor: ATX
- Design: Fully Modular
- BEST SMALL FORM FACTOR PSU FOR RTX 4090
Corsair SF850L
- Wattage: 850W
- Form Factor: SFX-L
- Rating: 80 Plus Gold, Cybenetics Platinum
- Design: Fully modular
-
BEST ENTRY-LEVEL PSU FOR RTX 4090EVGA GQ 1000W Gold
- Wattage: 1000W
- Rating: 80 PLUS Gold Certified
- Form Factor: ATX
- Design: Semi Modular
- BEST WARRANTY PSU FOR RTX 4090
Seasonic Focus GX-850
- Wattage: 850W
- Form Factor: ATX
- Rating: 80+ Gold, Cybenetics Gold
- Design: Fully modular
- BEST EFFICIENCY PSU FOR RTX 4090
Fractal Design Ion+ 860P
- Wattage: 860W
- Form Factor: ATX (325 x 110 x 210mm)
- Rating: 80+ Platinum, Cybenetics Platinum
- Design: Fully modular
- BEST BUDGET PSU FOR RTX 4090
Thermaltake Smart RGB 500W
- Wattage: 500W
- Form factor: ATX
- Rating: 80+ White, Cybenetics Bronze
- Design: Non-modular, RGB fan
How we selected the best PSU for RTX 4090
Choosing a PSU can be daunting, but we focused on a few key factors to ensure we had a wide variety for all your RTX 4090 needs. First, it is important to understand your power needs. Typically, the RTX 4090 requires a minimum of 850W so you don’t want to be selecting GPUs below this threshold, similarly, you don’t want to buy an overly powerful PSU. This ‘overkill’ threshold is typically around 1200W, though we did make sure to include a PSU with more for all those power-hungry PSU fans out there. Next, we considered quality. We looked for PSUs with 80 Plus certifications for efficiency and choose reputable brands known for reliable components
Beyond the basics, there are features to consider. Modular cables make managing wires easier, while quiet fans are ideal for silent builds. Safety features like over-voltage protection are essential. Don’t forget about the form factor – a PSU needs to fit your PC case. Finally, we considered value for money and price of features and quality.
Lastly, we also had hands-on experience with multiple of the PSUs in this guide, meaning we not only reviewed them but also tested them. We have provided scores and additional insight for these specific products and links to said reviews are included in each section. Make it to head on over if you find a particular interest in our reviewed PSUs.
- Wattage: 1000W
- Form Factor : ATX
- Rating: 80 Plus Gold, Cybenetics Gold
- Design: Fully modular, side connectors
- Shifted power connector locations
- 1000W is plenty of power
- 7 PCIe connectors for all your GPU or add-in card needs
- Large size, needs consideration for a build and casing
- In the top tier price range for a PSU
One of the leading PSUs on the market today, the Corsair RM1000X Shift is our top pick for a PSU to pair with the RTX 4090. Why? Well, it is simple. The Corsair RM1000X Shift has several factors which make it a real gem in today’s PSU marketplace. Firstly, it has shifted power connector locations, meaning the days of fumbling around in your PC case are over. You can find these connectors on the side of the PSU. Additionally, the 1000W is more than enough for a comfortable experience with the RTX 4090. It is helped, of course, by the 7 PCIe connectors which help with your GPU and add-in cards. It does come with a premium price tag though, as most top-notch PSUs do these days. However, its excellent design features, like large headroom and quiet performance help in justifying the price here. It’
Overall the RM1000X Shift is an excellent choice of power supply for your current or any future builds.
PCWer
So, while the RM1000X offers a tempting combination of ample power for headroom, excellent efficiency, and quiet operation, it does come at a premium price compared to standard PSUs. To justify the price, take full advantage of the innovative side-mounted cables that simplify cable management. The top-notch build quality should ensure this PSU lasts through multiple PC builds, making it a worthwhile investment in the long run. This balance of features, power, and value are the reasons for it being a the top of our list.
What users say
Online reviews on Amazon indicate universal praise for the RM1000X. Scoring 5 stars from 87% of reviews, users highlighted the RM1000X for its performance, quality, noise control, and ease of installation. In one review, a customer noted “The Corsair RMX Series (2021), RM1000x, 1000 Watt power supply is an absolute powerhouse that has exceeded my expectations in every way. As an enthusiast with a high-performance system, finding a reliable and efficient power supply is crucial, and the RM1000x delivers exceptional performance”.
- Wattage: 1600W
- Rating: 80 PLUS Platinum Certified
- Form Factor: ATX
- Design: Fully Modular
- ATX 3.0 compatible
- 100% solid state Japanese Capacitors
- Top Platinum standards
- Hefty price tag
- 1600W is a lot of power and will be more than substantial for most titles
- User reports of high noise levels during high demand
We prefer to go big for our best pick. The EVGA Supernova 1600W Platinum is the best PSU on the market right now, making it one of the best PSUs for the RTX 4090, as well. It has 100% Japanese capacitors, plus a DC-DC Converter design to improve 3.3V/5V stability. Thanks to EVGA’s ECO Mode, the PSU provides ultra-quiet operation at quite a long lifespan.
The Supernova was built under the last PCI-e Gen 5 and ATX 3.0 standards, so it contains up to nine VGA connectors that provide more than enough space for six cables for up to two PCI-e Gen 5, 12+4 pin connectors.
A 1600W power supply unit is more than enough to run an RTX 4090, and then some. You’ll have a ton of headroom for other high-end requirements, like CPUs, fans, cooling systems, and more. The Supernova ensures a smooth operation whether you’re gaming, streaming, or just consuming casual entertainment on Nvidia’s new RTX 4090. A bonus is that it will support any future upgrades you may toss its way later down the line.
What users say
Customers were impressed by the EVGA Supernova’s overall performance and premium feel. They report that it functions exactly as intended, and even exceeds expectations in terms of reliability. The build quality is also praised, with customers highlighting the use of high-grade materials and sturdy construction. Additionally, the device’s efficiency is a major selling point, achieving a Platinum rating – a significant factor for those seeking energy savings. One user noted, “stable, quality PSU. EVGA delivering for me yet once again”.
- Wattage: 850W
- Form Factor: SFX-L
- Rating: 80 Plus Gold, Cybenetics Platinum
- Design: Fully modular
- 850W is more than sufficient for the RTX 4090
- Small footprint
- 80 Plus Gold efficiency keeps your electrical use low
- 850W is pushing the minimum limit for the RTX 4090 performance
- Fan noise is noticeable
- Price is still rather hefty
The Corsair SF850L stands out for its impressive power packed into a small footprint. Ideal for Small Form Factor builds, it delivers a whopping 850 watts – enough for even high-end gaming rigs like the RTX 4090. This PSU boasts 80 Plus Gold efficiency, keeping your electrical use low. Plus, it features a zero-RPM mode, meaning the fan stays silent during low loads.
The Corsair SF850L is a handy dandy little PSU. As a small form factor choice, it provides great power and performance with great efficiency at the cost of some sound drawbacks.
PCWer
However, the SF850L isn’t without its problems. Some users report that the fan noise becomes noticeable under heavy loads. Another point to consider is that the included cables are quite long, which can be tricky to manage in tight SFF cases. Lastly, while undeniably powerful for its size, the SF850L comes at a premium price point compared to similarly rated ATX PSUs. Overall, the Corsair SF850L is a great choice for SFF enthusiasts who need top-tier power in a compact package. However, be prepared for potentially louder fan noise under heavy loads and the limitations of the included cables.
What users say
Customers on Amazon are overwhelmingly positive about the system power device’s aesthetics and user-friendliness. They describe its design as visually appealing and sleek, seamlessly integrating into various environments. Additionally, the compact size is praised for its space-saving benefits, and customers find the installation process to be straightforward and user-friendly. The performance also receives high marks, with users reporting it functions reliably and efficiently. However, some customers have encountered connectivity issues. Likewise, opinions on the value and overall quality of the device seem to be more divided, suggesting potential areas for further refinement.
- Wattage: 1000W
- Rating: 80 PLUS Gold Certified
- Form Factor: ATX
- Design: Semi Modular
- Great bang for the buck
- Fluid dynamic bearings
- Quiet operation
- 6 VGA 12+4 compatible connectors
- Is semi-modular
- Performance is not as strong as premium PSU picks
The EVGA GQ 1000W is a gold standard PSU capable of powering a 600W graphics card with ease. The RTX 4090 will suit it perfectly. If we take into account AIB recommendations, a 1000W PSU should be more than enough to run the RTX 4090. So, if gaming is your gig, this PSU will be one of the absolute best options. You won’t have to worry about this unit quitting anytime soon thanks to the 80 PLUS Gold certified, utilizing 90% (115VAC) / 92% (220VAC-240VAC), and 100% Japanese Capacitors.
It is semi-modular, though, which means that at least one cable will be connected at all times. On the other hand, it comes with six VGA connectors that can power up to a 600W GPU under the new ATX 3.0 and PCI-e Gen 5 standards.
What users say
Similarly, users online appreciate the value for money offered by the EVGA GQ 1000W. Additionally, its multiple cables and sturdy performance are praised. It is worth noting that most of the praise for this product is in conjecture with its price, meaning performance here is not comparable with some of the more premium PSUs. One user noted “This PSU works perfectly and it has increased the performance of my PC greatly! Easy to install, very quiet, and super efficient. Must have power supply!”
- Wattage: 850W
- Form Factor: ATX
- Rating: 80+ Gold, Cybenetics Gold
- Design: Fully modular
- Fully modular and supports hybrid mode for silent running
- Strong efficiency rating in both 80+ and Cybenetics
- 10 year warranty makes it a long-lasting purchase – no need for upgrades
- Original power connectors are quite large and difficult to manouver
- Short distance between the peripheral connectors on the same cable
Seasonic is a well-known brand for power supplies and they keep you covered well. That is also the case for the GX-850 as you will have 10-year support for it.
PCWer
Seasonic Focus GX-850 stands out for its long warranty. Boasting a stellar 10-year warranty, it offers peace of mind for users who want to maximise the longevity of their purchase and power supply. It is also important to note that long warranty often signifies the manufacturer’s confidence in a product’s reliability. While warranty length isn’t the sole indicator of quality, Seasonic backs it up with 80+ Gold efficiency, ensuring less wasted power and heat generation. This translates to a potentially quieter operation and lower electricity bills. What’s not to like?
- Wattage: 860W
- Form Factor: ATX (325 x 110 x 210mm)
- Rating: 80+ Platinum, Cybenetics Platinum
- Design: Fully modular
- An efficient and quiet power supply to last you many years
- Perfect performance metrics for RTX 4090
- Reliable user reviews
- Require a native ATX 3.0 PSU for modern day GPUs
- Users may find more value for money in Corsair RM1000X Shift
- Slightly lower efficiency at very low loads
Although a more expensive choice of power supply, the Fractal Design Ion+ 680P brings a high level of efficiency and wattage to your build.
PCWer
The Fractal Design Ion+ 860P prioritizes efficiency with its 80 PLUS Platinum certification. What does this mean? Well, it means this PSU wastes less power as heat, saving you money on electricity bills and keeping your system cooler. Packing 860W, it capably powers even high-end PC configurations with beefy graphics cards – such as the RTX 4090. Despite this, some reviews mention slightly lower efficiency at very low loads and a higher inrush current, which might be a consideration depending on your setup.
- Wattage: 500W
- Form factor: ATX
- Rating: 80+ White, Cybenetics Bronze
- Design: Non-modular, RGB fan
- Low price point
- RGB lighting provides some uniqueness and can be changed and turned off easily
- Performance is considerably lower than other options
- Lower-end of the threshold for RTX 4090 capabilities
Lacking the looks and customizability, you want to make sure it suits your needs with the limited-length cables and their red and yellow looks.
PCWer
The Thermaltake Smart RGB 500W is a budget-friendly PSU with 500W output, more than enough for mid-range PCs – even pushing performance for some premium GPUs like the RTX 4090. It boasts 80+ Standard efficiency for lower energy use and runs quiet with a 120mm fan. While the single +12V rail distributes power effectively and the RGB lighting adds a nice touch. While it will do for many, it does reach its limit at the performance capabilities of an RTX 4090. So, if your budget is tight, you will likely get away with a middling performance on the Thermaltake Smart RGB 500W, though it won’t push much than that due to limitations in reliability and power handling. We would recommend going that little bit higher on budget to secure a more RTX 4090-centric CPU overall.
Considerations for the best PSU for RTX 4090
The new graphics card by Nvidia has some intense standards. The 76.3 million transistors and 450W TDP need a ton of power output for smooth performance, and that power must come from the PSU. Nvidia recommended at least an 850W power supply to optimally run the GPU, but that might be a very low number for the boosted clock speeds this card can achieve in the right setting.
Keeping that in mind, we considered some AIB standards when postulating the best PSUs for the RTX 4090. Some of them follow Nvidia’s recommendation of an 850W PSU, but others are using a 1000W PSU and even a 1200W PSU.
| Models | Target Board Power | Minimum PSU Wattage |
|---|---|---|
| PNY RTX 4090 Verto Epic-X | 450W | 850W |
| Zotac RTX 4090 AMP Extreme, Trinity | 450W | 1000W |
| ASUS RTX 4090 ROG Strix OC | Unknown | 1000W |
| Palit RTX 4090 GameRock OC | 450W | 1200W |
You’ll have to consider your computer before making a final decision. The GPU is not the only component drawing power from the PSU. The final decision will solely depend on the total power your CPU needs in tandem with lighting, fans, cooling, and more.
Lastly, you will want to buy the best quality GPU, CPU, and motherboard for your RTX 4090. It will make a huge difference to your overall performance and the quality of your gameplay. Think of faster speeds and smoother visuals. Make sure to click the links to be taken to our specified guides on these components. You won’t be disappointed.
What is the minimum PSU wattage for the RTX 4090?
The minimum wattage needed to serve the RTX 4090 is around 1000W. While the RTX 4090 should still perform comfortably at 850W, we would say this is the minimum amount before it becomes worthwhile. Purchasing a PSU with a lower wattage than 850W would not be advised.
